IAR Embedded Workbench for Renesas RX 4.x |
IAR Systems, a future-proof supplier of software tools and services for embedded development, announces the availability of a major update of its development tools for Renesas RX.

- Support for the C11 language standard
The compiler and libraries add support for the latest C language standard ISO/IEC 9899:2011.
Note: the new C library binary object interface is incompatible with earlier versions of the product.
- Support for the C++14 language standard
The compiler and libraries now support the latest C++ standard ISO/IEC 14882:2014.
Note: the new C++ library binary object interface is incompatible with earlier versions of the product.
- Unicode support
The Unicode standard for consistent encoding, representation, and handling of text is now supported. This means that you can use Unicode characters (alphabetic, numeric, symbols, emoji, etc) in the source code.
- IDE performance improvements
General improvements of the IDE startup time and overall performance.
- E2 emulator support
C-SPY now supports the Renesas E2 on-chip debugging emulator.
- Stack protection
The IAR C/C++ compiler for RX now supports stack protection. A canary value will be placed between the stack variables and the return address so that the system can detect corruption of a function return address before the function returns to that address. The compiler will use heuristic to determine whether a function needs stack protection or not. If any defined local variable has the array type or a structure type that contains a member of array type, the function will need stack protection. See the IAR C/C++ Development Guide for more information.
- C-STAT MISRA C
The MISRA C 2004 package in C-STAT has been updated with about 20 new checks, some of which are enabled by default.
- Updated user documentation
The Assembler User Guide and IAR C/C++ Development Guide have been updated to reflect the product changes.